Roll polishing apparatus



Oct. l29, 1935. w. w. Ll-:AcH

ROLL POLISHING APPARATUS 6 Sheets-Sheet 1 Filed Aug. 11, 1935 Oct. 29,1935. w. w. LEAcH ROLL POLISHING APPARATUS Filed Aug. 11, 195ssheets-sheet 2 ATTORNE Oct. 29, 1935, w. `w. LEACH ROLL POLISHINGAPPARATUS v Filed Aug. l1, 195:5

6 Sheets-Sheet 5 INVENTOR. /////f/ /Kazdf ATTORNEY.;

Oct. 29, 1935. w. w- LEAcH ROLL POLISHING APPARATUS Filed Aug. 11, 19356 Sheets-Sheet 4 ATTORNEY.

Oct. 29, 1935. W, W. LEACH ROLL POLISHING APPARATUS Filed Aug. 11, 1933e sheets-Sheet 5 l l l l {IIIQWW d mx W 7 i. \mN Uw /NN 65 f n d' v W WATTORNEYI Oct. 29, 1935.

. W. W. LEACH ROLL POLISHING APPARATUS Filed Aug. 1l, 1935 6Sheets-Sheet 6 INVENTOR. ////ff Wr/@ BY l may ed' l ATTORNEYJ:

Patented Oct. 29, 1935 UNITED STATES BOLL POLISHING APPARATUS William W.Leach, Warren, Ohio, assignor to The Aetna-Standard Engineering Company,Youngstown, Ohio, a. corporation of Ohio Application August 11, 1933,serial No. 684,695

6 Claims.

The object of my invention herein described is to provide a device bywhich the upper roll of a mill, such as a two-high sheet mill, may bepolished continuously, or intermittently, during the operation of themill. The device is intended to be used in conjunction with a polisherfor the lower roll, suchas is shownin PatentNo. 1,977,001 issued to me,and is to be driven therefrom. As explained in my said' application, thepolishing of the lower or driven roll is more important than thepolishing of the upper roll, but it is often desired that both rollsshould be polished to secure maximum results in rolling.

In the accompanying drawings:

Fig. 1 is an end View of a two high mill, with a Vlower roll polisher,equipped with the top roll polisher described herein, same being inposition to polish the upper part of the front face of the roll; Fig. 2is a top view of the mill shown in Fig. 1; Fig. 3 is an elevational viewof the mill shown in Fig. 1 from the rear, showing the relation betweenthe two polishers, the mill proper being shown in phantom; Fig. 4 is anend view of such a mill equipped with the top roll polisher describedherein, same being in position to polish the lower part of the rear faceof the roll; Fig. 5 is a top view of Fig. 4; Fig. 6 is adetail drawingshowing sectionally a longitudinal cross section of the screw shaft andhousing with elements mounted thereon; Fig. 7 is an end view of apolishing stone holder with its mountings and a dirt collector; Fig. 8is a side view of a supportin bracket and mounting; Fig. 9 is a top viewof Fig. 8; Fig. `l0 is a cross sectional longitudinal view of a portionof the housing and screw shaft showing the nut mounted on the said screwshaft.

My device may be mountedto polish the upper -part of the front face ofthe upper roll, or may be used to polish the lower part of said roll onthe opposite side of the mill. When used in the position first stated,the device is removably mounted `on the inside faces of the windows inthe mill housing as shown in Figs. l and 2. For this purpose angle ironsI are mounted on said faces forming ledges upon which the polishingdevice rests. For purposes of adjustment, as when using a larger roll,liners areplaced on said ledge raising the polisher to the desiredposition. The device is further held in operative position by the pullof the tension means hereinafter described.

The polisher comprises a tubular screw housing 2 through which a screwbearing shaft 3`is rotatably mounted on bronze bushings which are heldin place in said housing by set screws. Mounted on the screw part ofsaid shaft and within said tubular housing is a nut 5 which carries aboss 6 projecting through a slot 'I in said housing, which slot is ofsufcient length to permit said nut to travel back and forth the entirelength of the face of the roll to be polished. The 5 screw housing restsin the angles formed by the mill housing with the angle irons mountedthereon, and carries on either end thereof a circular ball bearing 8 ofa well known type through which the ends'of the screw bearing shaft pass10 and in which said screw shaft revolves.

Mounted on said boss 6 is a stone holder bracket 9 which carries on itsfree end a polishing stone' holder I 0, so positioned that a polishingelement I I mounted therein will bear against the face of l5 the roll tobe polished. Fixedly mounted on said tubular housing at'l either end ofsaid slot 1 are two collars I2 carrying projecting levers I3. Mountedon, and connecting, said two levers is a bar I4 having a Z cross sectionto give it rigidity. 20

In the back of the stone holder I0 are mounted two rollers I5 which bearclosely'against one face of said Z bar. The nut 5, boss 6, bracket 9,and stone holder I0 are in an assembly in'fixed relation. A fixedrelation also exists between the 25 screw housing 2, the collars I2,levers I3 and the Z bar I4 in another assembly. The nut 5 is mounted onthe screw portion I6, of the screw shaft 3, and is moved therealong asthe screw shaft is revolved. This movement is the only 30 possiblemovement between the two assemblies, as the stone holder is sopositioned that it travels along one face of the Z bar against which itis pressed as the polishing stone carried thereon isV pressed againstthe face of the roll. 35

For the purpose of applying pressure to force the polishing elementagainst the roll to be polished, two collars I'I carrying fixed leversI8 are non-rotatably mounted, one at either end of the screw housing 2and beyond the mill hous- 40 ings. To these levers spiral springs I9 areattached, which springs are put under tension by means of chains 20which may be adjustably secured in forked anchors ZI, mounted on theoutside of the mill housings. Tension on said springs 45 causes the twoassemblies above described to tend to move about the screw shaft as anaxis and the polishing element carried on stone holder I0 is pressedrmly against the face of the roll to be polished. 50

The screw shaft 3 is preferably made hollow that a stream of water forcooling may be forced therethrough. For this purpose suitable couplingsare provided at either end thereof.

Power to rotate the screw shaft 3 and the screw 55 toY Ymember 4|.

i6 cut thereon and force the nut 5 carrying the stone holder I0 forwardand back across the face of the roll is provided through a sprocketwheel 22 and a sprocket chain 23, driven by the lower roll polisher.This sprocket wheel 22 is provided with the number of teeth needed togive the desired speed of rotation, and is revolvably mounted on one endof the ,screw shaft .outside the mill housings. Between said sprocketwheel and the mill housing a half coupling 24 is mounted by two setscrews. Mounted between said half coupling and said sprocket wheel, andengaging a iiat face on each, is a fibre disk 25. :On the other side ofsaid sprocket wheel-and engaging the opposite face is a second bre `disk2B. Loosely mounted on said screw shaft beyond said `second disk and inclose contact therewith is aV thrust plate 27, in which are three spacedholes 23 for engaging thrust pins hereinafter described. Fixedly mountedby set screws on said screw shaft, beyond the thrust plate is a thrustcollar 29. Fixedly mounted in the inside face of said thrust collar arethree thrust pins 30 which engage the three holes 28. Said collar alsocarries three holes 3| therethrough in which are mounted coilcompression springs 32. In the outer ends of said holes 3| are threadedset screws 33 which bear against said springs and compress them againstthe thrust plate 21.

Loosely suspended fromA a pin 34 mounted in the stone holder bracket 9is a hook shaped bracket 35`which envelopes the polishing stone andholder/and catches the dust and chips which result from the polishingoperation` Dust or chips which may adhere to the face of the roll arescraped-therefrom a knife edge 36 mounted on the lower lip 3T of saidbracket and held against the roll by the weight of the bracket.

When it is desired to polish the upper roll on the lower portion of itsrearward face as shown in Figs. 4 and 5, the assembly and drive aresimilar, but the polisher is mounted on brackets 45 which are attachedto the faces of the mill housings. Such a bracket is shown assembled 'inFigs. 8 and 9. A plate 38, fixedly attached to the side of the millhousing, carries studs 39 and 40. Loosely mounted on stud 39 is hookmember 4| which has a slot 42 near the end opposite the hook end of themember, and rotatably mounted on a stud 4T in the side of said hookmember 4| is wedge member 43. The slot 42 engages stud 40, and wedgemember 43 in operative position, is

Vforced down between said hook member 4| and a head carriedron said stud49. A handle pin 44 is mounted in said wedge member, and a handle 35 isprovided on hook member 4| beyond the slot 42. To remove the polisherfrom the mill, wedge member 43 is lifted releasing the hook The handle45 of said hook member may then Vbe lifted which drops the hook end uponwhich the polisher assembly rests, and

'the latter may then be withdrawn from the mill.

In operation the sprocket chain from the lower roll drives the sprocketwheel mounted on the end of the screw shaft. The Vcornpressiveele-Aments of the friction clutch` are so adjusted that the screw shaft isrotated in its housing. The boss carried by the nut'mounted on saidshaft fits in the slot in rthe lhousing and prevents rotation of thenut. Rotation of the screw shaft-causes the nut to move along the lengththereof carrying ties'of movement between the polishers on the lowerandon the upper roll are automatically adjusted, and the upper roll isfully polished syn- 15 chronous with the full polishing of the lowerroll.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mech- 20anism herein disclosed, provided the means stated by any of thefollowing claims or the equivalent of suchstated means be employed. 'l

I therefore `particularly point out and distinctly claim as myinvention: y K 1 1. In combination a machine for polishing the upperroll of a mill, a screw shaft mounted parallel to s'aid roll, a nutvmounted on said screw shaft which nut controls the movement of mountingsfor holding a polishing element, 30 means transmitting reversingrotation from a lower roll polisher to said screw shaft, whereby thesaid nut is caused to move forward and back a controlled distance alongsaid screw shaft, and a slip clutch between said means and said screw 35shaft, whereby said means may continue to operate when said nut reachesthe limit of said controlled distance before the rotation of said lowerpolisher reverses. V

2.V In an automatic polisher for the roll of a 40 mill,`in combination,a'hollow supporting4 member having a longitudinal slot therein, a wormscrew mounted through said member, a worm screw nut mounted on said wormscrew, a polishing element carrier mounted on said nut through 5 thesaid slot, means whereby reversing rotation is imparted to said wormscrew, and a slip clutch between said means and said worm screw wherebysaid meansv may continue to operate until ready to reverse after thesaid nut and carrier thereon o mounted has reached the limit of movementin either direction as determined by the length of ksaid slot.

`3. In an automatic polisher for the roll of a mill, in combination, ahollow supporting memn ber having a longitudinal slot therein, mountedthrough said member a worm screw with a longitudinal hole therethroughfor the passage of a cooling medium, a worm screw nut mounted on saidVworm screw, a carrier, adapted to hold a polishing stone, mounted onsaid nut by means of an element engaging said slot, means whereby saidworm screw is reversibly rotated, and a slip clutch between said meansand said worm screw.

4. In an automatic polisher for the roll of a mill, a hollow supportingmember having a slot longitudinal thereof, a worm screw shaft mountedtherethrough, a worm screw nut mounted on said worm screw, a carrier foran abrasive element 70 Ymounted on said nut through said slot, anabrascrew, nut andAY carrier is oscillated about the screw shaftbringing the carrier into a position 75 where said abrasive elementcarried thereby is 'compressed against the face of a roll, means wherebysaid worm screw is given a reversing rotation, and a slip clutch betweensaid means and said worm screw whereby movement of the means maycontinue after rotation of the screw is stopped by the arrival of saidnut at the end of said slot.

5. In an automatic polisher for the upper roll of a two high millequipped with an automatic lower roll polisher, including incombination, a hollow supporting member, a worm screw mountedtherethrough, a worm screw nut mounted on said screw and non-rotatablein said supporting member, a polishing stone holder mounted on said wormscrew nut, a polishing element mounted in said holder, means tooscillate said supporting member and said nut, with holder mountedthereon, to a position in which the element carried thereby is pressedagainst the roll, means driven by the lower roll polisher to impartreversing rotation to said Worm screw, whereby the said screw nut ismoved forward and back across the face of said upper roll, and a slipclutch interposed between said means and said worm screw wherebymovement of the former is possible when the latter is held immovable.

6. In combination in a device for polishing a roll of a mill, a wormscrew shaft revolvably mounted, a worm screw nut mounted on said shaftand carrying a holder adapted to receive a polishing element, meansadapted to hold said nut against rotation with said shaft, means adaptedto impart reversing rotation Vto said worm screw shaft synchronouslywith the reversing movement of mechanism polishing another 15 WILLIAM W.LEACH.

